High-level Architecture and Compelling Technologies for an Advanced Web-based Vehicle Routing and Scheduling System for Urban Freight Transportation

The search for a more efficient routing and scheduling, the improvement of service’s level and the increasing complexity of real-world distributive contexts are contingent variables that generate the need for a system’s architecture that may be holistic, innovative, scalable and reliable. Hence, new technologies and a lucid awareness of involved actors and infrastructures, provide the basis to create a more efficient routing and scheduling architecture for enterprises

Paperiteollisuuden tiekuljetusten seuranta ja jäljitys

The purpose of this thesis was to find out what is the most suitable track & trace solution for road cargo in paper industry. The research objective was to propose a solution or technology that provides the data and information according to the requirements. Both theoretical and empirical research was conducted to reach the research objectives. The research was conducted as a pragmatic, mono method qualitative study. The theoretical research was a literature review which focused on track & trace solutions. Existing track & trace solutions were researched, and their features, advantages and disadvantages were listed. In addition, supply chain and supply chain management were studied. Empirical research was conducted through semi-structured interviews. Three persons from the customer organization participated in the interviews. The main discussion topics were the information needs of the customer organization, and the benefits they expected the solution to bring. Analysis of the interviews was conducted inductively, and results grouped on the high level by research question themes. The themes were identified and findings from the theoretical and empirical researches were compared and combined. Based on the findings, conclusions were made, and the research questions were answered. The customer organization’s requirements for the track & trace solution were solved, as well as the existing solutions on the market today. It was found that the most suitable solution for the customer organization would be a cloud-based mobile app that provides real-time location data, and that that can keep them up with the digitalization. The solution’s technology should be based on GPS & GSM. Other communication technologies are also possible, but GSM has been proved to be very reliable. This kind of solution could be later on developed to an Internet of Things solution. Later they could add other data collection technologies to the service, and as the technology develops other analyzing methods could be taken into use as well. The solution should also be custom-made according to the customer organization’s needs and preferences. It is a lot easier to develop the solution if it is made according to their needs, and the integration to their existing systems will be easier. Also, they are not tied to certain carriers if they develop a solution that carriers just take into use, rather than integrating into certain carriers’ fleet management systems. A custom-made solution might be more expensive than integrating into an existing one, but the benefits are greater

Analysis of Precipitable Water Vapour in Angola Using GNSS Observations

For accurate weather predictions and analysis of extreme events, a good estimate of the amount of water content in the atmosphere is essential. This information is provided by several techniques like radiosondes that measure this parameter at various heights. However, most of them are very limited spatially and temporarily or suffer from measurement specific constraints. To complement these techniques, Precipitable Water Vapor (PWV) can be measured with GNSS (Global Navigation Satellite System) at CORS (Continuously Operating Reference Stations) networks. when the temperature and pressure are also known at the station location. PWV can be derived from the delay in the GNSS signal when it passes through the troposphere. In the framework of SUGGEST-AFRICA, it is being implemented a system to use the national GNSS stations for the automatic computation of PWV in Angola. Thus, this dissertation intends to describe the necessary steps to develop a system to be used for supporting meteorological and climate applications in Angola. SUGGEST-AFRICA also funded the installation of 5 weather stations, collocated with GNSS stations in Angola namely: Benguela, Cabinda, Cuito, Luanda and Namibe, in order to obtain pressure and temperature which is necessary to obtain the PWV estimates. When there are no nearby meteorological stations, the potential alternative is to use values from global/regional models. Methodologies have been optimized to passive and actively access the GNSS data; the PWV estimations are computed using PPP (Precise Point Positioning), which permits the estimation of each station separately; solutions have been validated using internal values. In addition, analyses are presented to evaluate the reliability of the network. This work presents preliminary results for the variation of the ZTD data available all around the territory in Angola and how they relate to the seasonal variations in water vapour. Also, presents preliminary results for the time-series variation of PWV in the Luanda station (collocated by the SEGAL group). This study is supported by SUGGEST-AFRICA, funded by Fundação Aga Khan and FCT. It uses computational resources provided by C4G – Collaboratory for Geosciences (PINFRA/22151/2016). It is also supported by project FCT/UIDB/50019/2020 – IDL funded by FCT.Para precisão da previsão do tempo e análise de eventos extremos é fundamental uma boa estimativa do vapor da água na atmosfera. O vapor da água na atmosfera é fornecido por várias técnicas como radio sondagem que mede este parâmetro em várias alturas. No entanto, muito dessas técnicas são limitadas devido a resolução espacial e temporal ou sofrem restrições específicas de medição. Para completar estas limitações encontrado nas demais técnicas, o vapor da água precipitável (PWV) pode ser medido pelo GNSS (Sistemas de navegação global por satélite) CORS (Rede nacional de estações de referência de operação continua). PWV pode ser obtido a partir do atraso do sinal de GNSS através da troposfera, quando a temperatura e a pressão também são conhecidas derivado da localização duma estação meteorológica. No âmbito da SUGGEST-ÁFRICA, esta ser implementado um sistema de modo a calcular o PWV de uma maneira automática em Angola. Assim, nesta dissertação pretende descrever os passos necessários para desenvolver tal sistema a ser utilizado para apoiar aplicações meteorológicas e climáticas em Angola. SUGGEST-ÁFRICA também financiou a instalação de 5 estações meteorológicas, colocada com estações GNSS em Angola, nomeadamente: Benguela, Cabinda, Cuito, Luanda e Namibe, a fim de obter a pressão e a temperatura necessárias para obter as estimativas PWV. Aconselha-se o uso dos modelos globais/regionais para aquisição de valores de pressão e temperatura quando não existe dados nas estações meteorológicas adjacentes. As metodologias foram otimizadas para o acesso passivo e ativo dos dados GNSS; a estimação do vapor de água precipitável é calculada usando a técnica PPP (Posicionamento do ponto preciso), que permite a determinação de cada estação individualmente e separadamente; as soluções foram validadas usando valor interno. Além disso, são apresentadas análises para avaliar a fiabilidade da rede. Este trabalho, também apresenta resultados preliminares para a variação de todo dados do ZTD disponível em Angola e a forma como se relacionam com as variações sazonais do vapor de água. Também, apresenta variação da série temporal do PWV na estação meteorológica de Luanda (instalado pela SEGAL). Este estudo é suportado pela SUGGEST-ÁFRICA, financiado pela fundação Aga Khan e FCT. Utiliza recurso computacional fornecido pela C4G – Colaboração de Geociências (PINFRA/ 22151/2016). Também é apoiado pelo projecto FCT/UIDB/50019/2020 – IDL financiado pela FCT

INVESTIGATING ICT SOLUTIONS FOR THE PUBLIC TRANSPORTATION SYSTEM IMPROVEMENT IN THE FREE STATE: OPPORTUNITIES AND CHALLENGES

ThesisInefficiencies in the public transportation system in the Free State province resulting in poor quality public transportation has led to the investigation of Information and Communication Technology (ICT) solutions to improve the system, through integration, and the challenges and opportunities that may result from this integration. This research investigates ICT solutions for public transportation improvement focusing on the challenges and opportunities for all stakeholders of the public transportation system. Critical review of South African legislation and policies on public transportation and ICT was carried out. This was to review government laws and policies governing public transportation development. It also reviewed how the government planned on improving public transportation, developments so far based on those plans and future plans, and how these legislations by the government have been carried out in the Free State province. A theoretical framework was developed to lay out expectations for the integration process including the adoption of technologies and adaptations to the new integrated public transportation system based on technology acceptance and diffusion theories. Questionnaire and Interview surveys were carried out on public transportation vehicle owners, drivers, public transportation users and non-users to assess the current state of public transportation, their needs that could potentially be solved by ICT and the challenges likely to be faced. The use of questionnaires was also to assist in identifying and defining elements needed for successful integration of ICT into the system. ICT experts, transportation planners, academics, public transportation owners and users were also interviewed to gain more understanding and insight on ICT solutions, the public transportation systems, technologies for potential use in the public transportation system and challenges that may arise due to integration